PR #90732 removed the per-bot Sessions browser (right-click -> Sessions),
but the Disband-group confirm dialog still told users they could open the
kept 'Group: X' sessions 'from each bot's session browser' - an affordance
that no longer exists. Drop the stale clause; also update the one test
comment that still described the removed workspace.
Review follow-up from #90732 (found by the 3-angle review pass).
kshitijk4poor
8265b873e0